The phrase "neighboring tribes" refers to groups of people or communities that live close to each other and have a cultural, historical, or geographical connection. Full definition
Also, can you imagine how confusing messages about not raping women and children from neighboring tribes would be? (religion.blogs.cnn.com)
The people of God were part of the picture, warring with neighboring tribes and kingdoms, even as doom peered over the horizon from E ~ pt or Assyria; also warring among themselves in tribal rivalries and in the north - south division of Israel and Judah. (religion-online.org)
He's also friendly with the heads of neighboring tribes, including Okoye's love interest, W'kabi (Daniel Kaluuya). (punchdrunkmovies.com)